(Note: When you click to download, view AdFly's ad page for 5 seconds and click Skip Ad button found on the upper right part of the page.)If you encounter IMEI Invalid or no network connection issue after flashing your firmware with SP Flash Tool, read on:

Hello Khien, the Android OS version jellybean that is shown in the specs of Firefly s60 v4 is the original OS version it comes with it when it first came out to the market. If you bought your phone lately, it comes with Kitkat. But as long as you have the same model, flashing with the firmware provided above is compatible. You can always update it OTA anytime to upgrade its OS version. Thanks for asking.

after flashing , reinsert battery before turning it on. If it is still not working, re flash it again. Please make sure that your mobile is firefly s60 v4. Format the device first before flashing. First boot after flashing usually take a while.

Do I need other software for my computer to recognize my phone? I'm still downloading the firmware, haven't done the flashing yet, but whenever I tried to connect the device before, it wasn't showing anywhere in explorer and in device manager. I read somewhere that I have to download ADB and USB drivers. Do I really need those for this to work?